长时间运行弹簧批量作业中的TransactionSystemException

Question

我有一个弹簧批量作业，有时运行时间超过2700秒。当他们这样做时，我注意到来自Spring批处理框架的异常。

springframework的版本：

<spring-batch.version>2.2.7.RELEASE</spring-batch.version> 
<spring.framework.version>4.0.3.RELEASE</spring.framework.version> 

这里是工作的定义：

<batch:job id="MyJob"> 
    <batch:step id="trigger-job" next="poll-job"> 
     <batch:tasklet ref="triggerJobStep" /> 
     <batch:listeners> 
      <batch:listener ref="phaseStepListener" /> 
     </batch:listeners> 
    </batch:step> 
    <batch:step id="poll-job"> 
     <batch:tasklet ref="pollJobStatusStep" /> 
     <batch:listeners> 
      <batch:listener ref="phaseStepListener" /> 
     </batch:listeners> 
    </batch:step> 

    <batch:listeners> 
     <batch:listener ref="phaseCompletionListener" /> 
    </batch:listeners> 
</batch:job> 

好像连接到数据库已经不多了。

这个问题总是发生在我轮询一个需要很长时间的服务时。

如果有任何建议或其他方法，请让我知道！

另外请注意，对于那些运行时间不长的工作，这是没有问题的。

如果您需要更多信息，请让我知道。

谢谢， 戴夫

工作的堆栈跟踪：45分钟后

"errorMessage":"Step requested termination: StepExecution: id=15365, version=2, name=poll-cmpaas-deploy, status=UNKNOWN, exitStatus=FAILED, readCount=0, filterCount=0, writeCount=0 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=0, rollbackCount=1, 
exitDescription=org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking 
    at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:546) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:849) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:826) 
    at org.springframework.transaction.support.TransactionTemplate.rollbackOnException(TransactionTemplate.java:164) 
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:137) 
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:267) 
    at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77) 
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368) 
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) 
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) 
    at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:253) 
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195) 
    at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:141) 
    at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64) 
    at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:60) 
    at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:151) 
    at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:130) 
    at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135) 
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301) 
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:134) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: javax.persistence.PersistenceException: unexpected error when rollbacking 
    at org.hibernate.jpa.internal.TransactionImpl.rollback(TransactionImpl.java:111) 
    at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:542) 
    ... 20 more 
Caused by: org.hibernate.TransactionException: rollback failed 
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:217) 
    at org.hibernate.jpa.internal.TransactionImpl.rollback(TransactionImpl.java:108) 
    ... 21 more 
Caused by: org.hibernate.TransactionException: unable to rollback against JDBC connection 
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:167) 
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:211) 
    ... 22 more 
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communications link failure during rollback(). Transaction resolution unknown. 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 
    at com.mysql.jdbc.Util.getInstance(Util.java:386) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920) 
    at com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:5101) 
    at com.mchange.v2.c3p0.impl.NewProxyConnection.rollback(NewProxyConnection.java:860) 
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:163) 
    ... 23 more 
Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking","warningMessage":null,"data":null}' 

Answer 1

你的数据库连接被切断。无论是你的服务器正在杀死它，或者（更可能）你的应用程序和数据库之间有一个防火墙，它正在杀死长时间持续连接（防火墙通常会切断持久连接，无论它们在一段时间后都处于使用状态的时间）。假设它是一个防火墙，您需要将其配置为不切断连接。